Operation And Maintenance; General Recommendations For Cleaning; Filters - CIAT Climaciat Instruction Manual

ƒ Air noise check:
In case of abnormal noise:
- Check the mountings of the connection ducts at the unit's inlet and outlet,
- If the noise is caused by a leak at a block connection, make sure the gasket is correctly positioned (see § 6.3 Assembling
the blocks),
- If the noise is caused by a leak at the door, adjust the hinges and handles,
- If the noise is caused by air passing through a damper, make sure that the servomotors are correctly set (opening/closing),
based on the site requirements,
- Incorrectly sized ducts resulting in excessive air speed may also cause this type of problem. The air duct network must
therefore be balanced before a problem can be assumed on the AHU.
ƒ Hydraulic noise check:
In case of abnormal noise, check:
- The operation of the air bleed valves on the coil manifolds or the system,
- The condition of the water filters,
- The installation of the 3-way valve,
- The water flow rate value.
ƒ Check the current of the electrical devices (using a current clamp):
- Make sure the current values do not exceed the current values on the data plates of the various components (motors/
electric heaters/etc.),
- FMAs with an inverter can only be measured on the inverter display,
- Check the phase balance (max. deviation 2%).
ƒ Check the activation of the safety devices. Make sure:
- The safety devices (crankcase, protective grille) are correctly secured and not in contact with moving parts,
- The door contacts cut the motor electrical supplies and the control (option).
- The self-contained activating detector safety devices – fire/smoke detection) are operational (use the aerosol supplied with
this device, see supplier's manual),
- Antifreeze protection alarm: Activate this safety device by rapidly cooling the safety thermostat (aerosol can),
- Min. flow rate limit => procedure: for units with electric heaters, check this cut-off value to prevent overheating.
ƒ Operating readings:
- Take initial complete operating readings, including measurements of the flow rate, pressure, air/water temperature,
pressure drop in the filters/recovery exchanger, voltage, current.

10 - OPERATION and MAINTENANCE

10.1 General recommendations for cleaning

To disinfect, use cleaning products which are compatible with the list of disinfectants approved by RKI (Robert Roch Institute) or
VAH (Verbund für Angewandte Hygiene). Respect the contact times and concentrations indicated by the manufacturer.
ƒ Do not use any flammable products
ƒ Do not use sponges or abrasive tools
ƒ Clean the seals on the doors and access panels
ƒ You are recommended to follow the maintenance requirements set out in the VDI 6022 standard (table 6)

10.2 Filters

10.2.1 Periodic maintenance
ƒ Every 3 months.
ƒ Every month for ATEX units
ƒ Follow the instructions given in section 10.1 General recommendations for cleaning
Warning!
Follow the safety instructions (see § 2 - SAFETY INSTRUCTIONS).
ƒ The filter cells are flammable products, and the fire risk may increase depending on the elements filtered by the medium.
Keep the filters away from flames.
ƒ Mounting, cleaning and replacement of filters pose risks of allergies and irritation of the skin, airways and eyes. When working
on the filters, always use suitable Personal Protective Equipment.
ƒ The filters should be checked regularly depending on the operating conditions.
Severe fouling of the filters may pose risks to the health of occupants or the production processes.
ƒ Maintenance phases:
- 1. Check the condition of the filters (fouling level, tears, corrosion) and the sealing gaskets (except for assembly with
bare runners),
Warning: even if no clogging is visible, mould or bacteria may still be present.
- 2. Check for mechanical jamming of the filters,
- 3. Clean all the components upstream of the filters and the duct networks,
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